Covington is a Pratt & Whitney Canada certified Distributor and Designated Overhaul Facility (DDOF) for the following PT6A models:

• -10
• -11
• -20
• -20A
• -20B
• -21
• -25
• -27
• -28
• -34
• -36
• -67AG
• -67F
• -110
• -112
• -121